Trend lines are drawn on charts to help predict the general direction of price.It also help to determine good entry and exit point.they also help to see the reversals.
bhai trend line hoti hai woh line jo humein chale gaye aur aane wale market mein trends ke baare mein batati ha isko padna bhauat zyada zarori hai mein toh yeh kahunga ki forex trading mein agar aapko paisa kamana hai toh aapko iss field mein sahi se sab chezon ko janna zarori hai warna iss field mein aapko loss ho jata hai.